<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="/js/vue.js"></script>
</head>
<body>
    <div id="app">
        <counter></counter>
        <counter></counter>
        <counter></counter>
    </div>
    <script>
        //局部注册组件需要在船舰Vue实例时通过components选项进行定义
        let vm=new Vue({
            el:'#app',
            components:{
                counter:{
                    data:function (){
                        return{
                            num:0
                        }
                    },
                    template:'<button #click="num++">点击{{num}}次</button>'
                }
            }
        })
    </script>
</body>
</html>